johnson



2 Sheets-Sheet,- 1.

(ModeL) A. J. JOHNSON.

MAQHINE FOR PUNOHING METAL.

Patented Feb. 14,1882.

t f l mi 5 l l E i E E E? (Model) 2 Sheets-Sheet 2.

A. J. JOHNSON.

' MACHINE FOR PUNGHING METAL. Y

No. 253,608,. w Patente d1882.

- and punch-holder.

UNIT D STATES PATENT OFFICE.

ANDBEVV J. JOHNSON, OF CUYAHOGA FALLS, OHIO, ASSIGNOR TO ERSKINE L.BABOOGK, OF SAME PLACE.

MACHINE FOR PUNCHING METAL.

SPECIFICATION forming part of Letters Patent No. 253,608, dated February14, 1882.

- Application filed August 19,1880. (ModelJ v To all whom it mag concernBe it known that 1, ANDREW J. J oHNsoN, ofOuyahoga Falls, Summit county,Ohio, have invented a new and useful Machine for Punching Metal, ofwhich the following is a specification.

My invention relates to improvements in machinesforpunching or cuttingmetals, in which the material to be operated on is automatically fed tothe punching-tools.

The objects of myimprovements are, first, to intermittingly release thematerial from pressure between the feed-rolls for the purpose ofallowing it to be properly adjusted in relation to the punches; second,to retain the punches firmly in their holder by compression of theplates composing the holderin which the punchsockets are formed;third,'to provide the dieplate with dies which are adjustable tocompensate for wear and sharpening; fourth, the adjustment of thematerial to be punched by means of a spring; and, fifth, to facilitatethe oiling ofthe material by means of hollow rolls perforated for thetransmission of the oil.

Figure 1 is a front elevation. Fig. 2 is a side elevation. Fig. 3 is avertical cross-section at the dotted line shown in Fig. 2. Fig. 4 is alongitudinal vertical section. The remaining figures are on an enlargedscale. Fig. 5 represents a longitudinal section of the die-holder Fig. 6shows a longitudinal section of the feed-rolls and parts for opera-tingthem. Fig. 7 is a view of the bottom of the punch-holder. Fig. 8 is aplan of the die-holder and stripper. Fig. 9 is a horizontal section atthe dotted line in Fig. 5. Fig. 10 is a section, on an enlarged scale,ofthe die-plate. Fig. 11 is a sectional view of the oil-rolls andadjacent parts.

The slide 1) carries the punch-holder a, and is given a verticalreciprocating motion by means of a pitman, b, shaft to, and pulley 10.It moves in guides g, which are bolted to frame f. The punch-holder a isconstructed ofplates c by placing them together with thin metallicsheets 0 between them, in which position they are firmly held, and thepunches in their sockets c compressed with plates 0 by means of nut b onscrew-bolt a Screw-bolt a is shape, firmly inserted in and supported bydieplate d. The socket h in die-plate d, below the die, is slightlylarger than the opening of the die to allow the die to be forced up inits socket for the purpose of grinding or sharpening it. When the diehasbeen shortened by use it may be removed and a ring, 8, placed in itssocket for the die to rest on when replaced. The stripper i is bolted tothe frame, leaving space between it and the frame for the material whichis to be punched, and also for the guide-r0110. Arm 6 is pivoted to thestripper and supports guide-roll 0. The adjustable bar 7? supports thetwo guide-rolls o o. The strip of metal to be punched is pressed byguide-r0110, actuated by spring 8, against guide-rolls 0 0. Spring 8 isattached to stripper i and presses against the pivoted arm 2', whichsupports guide-r0110. The guide-rolls o 0 0 adjust the strip of metal tobe punched to its proper position, when it is released from pressurebetween feed-rollsm m, as will be hereinafter shown.

The shafts a a of feed-rolls m m are connected by gear-wheels c c, andare operated to feed the machine by means of cam d on shaft a, connectedby lever l, cross bar 0, arm Z, spring 10, and jaws n n with wheel a onshaft a. Lever l is pivoted to frame f. Gross-bar c is adjustable onlever l and arm I for the purpose of regulating the feed. Thejaw n isloose on pin "i and shaft a to allow of slight vertical movement ofthejaw in griping the flange of wheeln and also to allow lateralmovement of pin i with arm I to turn jaw 12 011 its pivot. Jaws a n arepivoted together, and pin i is fastened in arm I. By turning arm 1 tothe right, Figs. 3 and 6, pin i which extends through a hole in jaw n,somewhat larger than the pin, turns jaw n on its pivot, causing itslower end to press on the circumference of wheel a and thereby lift jawat until the flange of the wheel is griped between the jaws which turnwheel shafts a a their gear-wheels 0 c, and feed-rolls m m to feed themachine. After the strip of metal to be punched has been thus fedforward, spring w, which is attached to framef and arm 1, moves back thearm, and thereby releases wheel a from the bite of jaws n n, and causesthe upper arm of lever 1, Fig.

3, to follow the form of cam d and approach shaft a.

The shaft a of the lower feed-roll, m, turns in box i which is elongatedto allow feed-roll m to be lowered to release the strip to be punchedfrom pressure between the feed-rolls. When so released the strip issubject to lateral adjustment by the pressure of guide-roll o, actuatedby spring 8, Fig. 5. Then rolls m m are feeding the strip to the punch,feed-roll m is pressed against the strip by a short arm, 021 Fig. 6, onrock-shaft m Figs. 2 and 3, which is operated by arm on, connected bybar a and roller n with cam d on shaft to. The arm a Fig. 3, isadjustable on arm m, to regulate the relative position of feed-roll m toroll m for strips of different thickness to be punched.

In the relative positions of the various'parts, asshown in thedrawing's,the punch 8 Fig. 5, is about to descend, the cam 01, Fig. 3, has ceasedto force out the upper arm of lever l, and hence the rolls on m havealready fed forwardthe strip to be punched. While the punch isdescending, and before it strikes the strip, cam d permits roller nactuated by spring '8, to approach shaft a, and thereby lowers arm m andreleases the strip from pressure between feed-rolls mm, and enablesguide-r0110 to adjust the st'r'ip, if needed, by forcing it againstguide-rolls 0 0 before the punch strikes the strip; also,while the punchis descending, c'amdpermits spring to to move arm Z to the left, therebyreleasing the jaws n n and sliding them on the flange'ofwheel 02 Whenthe strip has been punched and the punch has been withdrawn from it andis continuing to ascend, cam d 0 0 Figs. 1 and 11, which are'compressedagainst it by spring 8 and turn on hollow shafts w w. The boxes of theseshafts are elongated to allow the oil-rolls vertical adjustment todifferent thicknesses of strips'passing between them. Oil is conduetedby tubes 0 0 (parts of which are shown in Fig. 11) into one end of eachshaft 00, the opposite end of the.

shaft being closed. The sides of shafts m are perforated to allow oil toflow into cavities o extending around the interior of oil-rolls 0 andfrom thence to the circumference of the rolls, where it saturates afibrous or other suitable covering, v, around the rolls.

This machine may be used for making nuts by placing in the punch-holdera tool for cutting off nuts from the punched strip.

I claim as my invention- 1. The feed-rolls m m, one of them having anintermittent motion away from the other, in combination with shaft arock-shaft m arms m m 12 and cam (1 substantially as described.

2. The jaws n n, in combination with flanged wheeln and arm I, providedwith pin "i substantially as described.

3. The c'am d and lever l, in combination, and adjustably connected witharm l,jaws n n, wheel a and f eed-rolls m m, substantially as described.

4. The punch-holder a, in combination with pitman b, shaft a,ca-'ms d 01lever 1, arms Z m M, jaws a n, adjusting guide-r0110, and feedrolls m m,one of the feed-rolls having an intermittent motion away from theother,substantially as and for the purpose specified.

ANDREW J. JOHNSON.

Witnesses:

A. B. GURTISS, J oHN'R. BLAKEsLEE.

